JP2024008397A - Lanyard for crash arrest appliance, and crash arrest appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lanyard for crash arrest appliance and a crash arrest appliance which can be improved in working properties and safety properties.

SOLUTION: A lanyard 5 comprises: a fitting part 11 which is fitted to shoulder girdles 2 at a back part of the shoulder girdles 2 being put around left and right shoulders; a shock absorber 12 extending downward from the fitting part 11; a branch part 13 arranged at a position below the shock absorber 12 and whose height corresponds to a height of the lumbar part of a user; and a hook part 14 which has a rope 15 which is branched to left and right sides from the branch part 13, and lanyard hooks 10 provided on a tip end of the rope. A crash arrest appliance 1 comprises: the shoulder girdles 2 put around left and right shoulders and extending to the lumbar part of a user; thigh belts 3 each of which is connected to a lower end part of the shoulder girdle 2 and is put around the left/right thigh; rest hooks 4 each of which is arranged on the shoulder girdle 2 or a same position to the height of the lumbar part of the user on the thigh belt 3 or a lower position lower than the height of the lumbar part of the user on the thigh belt; and the lanyard 5. The lanyard hooks 10 can be engaged to the rest hooks 4.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a lanyard for a fall prevention device used for high-altitude work at a construction site, etc., and a fall prevention device using this lanyard.

When working at heights, such as at building construction sites, it is essential to wear fall arrest equipment to prevent falls. This fall arrest device includes a shoulder strap that is placed around the user's left and right shoulders, and a thigh strap that is connected to the lower end of the shoulder strap and placed around the user's left and right thighs. .

For example, in the configuration shown in Patent Document 1 below, a connecting part (connecting metal fitting) is provided on the back part of the shoulder girdle (near the middle between the left and right shoulder blades), and a buffer belt (shock absorber) extends downward from this connecting part. has been extended. A connecting portion is provided at the lower end of the buffer belt (approximately at the center of the user's back). A rope is connected to the connection part by branching to the left and right. A lanyard hook is provided at the tip of each rope to be hooked to a handrail or the like at a construction site (see paragraph 0008 of Patent Document 1, FIG. 7, etc.). For example, as shown in Patent Document 2 below, this lanyard hook is generally locked to a resting hook provided in front of the user's chest when not in use (Paragraph 0019 of Patent Document 2, Fig. 4 etc.).

Japanese Patent Application Publication No. 2020-18479 Japanese Patent Application Publication No. 2013-150665

To ensure the safety of users at construction sites, in addition to wearing fall prevention equipment, they also wear air-conditioned clothing such as cooling jackets equipped with cooling fans to prevent heatstroke, and equipment to keep body temperature in winter. There is an increasing number of opportunities to wear secondary equipment over fall prevention equipment, such as winter clothing, life jackets to prevent falling into the water, and reflective vests that are required to be worn during nighttime construction and during daytime construction on expressways.

However, in the configurations described in Patent Document 1 and Patent Document 2, the hem of the secondary equipment is rolled up by the rope branching from the lower end of the buffer belt, and the rest hook that locks the lanyard hook at the tip of the rope is There is a risk that it will be largely hidden by the next equipment, reducing work efficiency and safety.

In order to ensure workability when attaching fall arrest equipment, normally secondary equipment is attached after attaching fall arrest equipment, but the order of attachment is changed and the order of attaching secondary equipment is changed to prevent a fall after attaching secondary equipment. It is possible to wear a restraining device. In this way, the workability of the fall prevention equipment can be ensured, but on the other hand, for example, the air-conditioned clothing is compressed by the shoulder straps, waist belts, etc. of the fall prevention equipment, and the flow of air inside the air-conditioned clothing is obstructed. , the insulation of winter clothing is compressed by the shoulder straps, waist straps, etc. of fall prevention equipment and loses its original warmth; most of the reflective material in reflective vests is hidden in the shoulder straps, waist straps, lanyards, etc. of fall prevention equipment. This may cause problems such as not being able to achieve its original visibility.

Therefore, an object of the present invention is to provide a lanyard for a fall prevention device and a fall prevention device that improves workability and safety without impairing the performance of secondary equipment such as air-conditioned clothing.

In order to solve the above problems, in this invention,
an attachment part that is attached to the shoulder girdle at the back portion of the shoulder girdle that is hung around the left and right shoulders of the user, respectively;
a shock absorber extending downward from the mounting portion;
a branch part below the shock absorber and corresponding to the height of the user's waist;
a hook portion including a rope branched left and right from the branch portion, and a lanyard hook provided at the tip of the rope;
A lanyard for fall arrest equipment is constructed.

Furthermore, in this invention,
Shoulder belts that are hung around the user's left and right shoulders and reach the waist,
a thigh belt connected to the lower end of the shoulder belt and wrapped around the left and right thighs of the user;
a resting hook provided at a position equal to or lower than the waist height of the user of the shoulder belt or the thigh belt;
A lanyard for the fall arrest device described above;
The lanyard hook of the fall arresting instrument lanyard constituted a fall arresting instrument configured to be able to be latched to the resting hook.

As described above, if the lanyard for the fall arrest device and the fall arrest device are configured, when the user attaches the fall arrest device and then attaches the secondary equipment, the rope at the hook part will be attached to the secondary equipment. This can prevent the hem from rolling up because it tends to be on the underside of the hem. Further, since the rest hook for locking the lanyard hook is provided at the height of the user's waist, the lanyard hook can be easily attached and detached while the secondary equipment is attached.

In this invention, since the lanyard for fall prevention equipment and the fall prevention equipment are configured as described above, it is possible to prevent a fall using the lanyard for fall prevention equipment without impairing the performance of secondary equipment such as air-conditioned clothing. The workability and safety of the restraining device can be improved.

A rear view showing the first embodiment of the fall arrest device according to the present invention A perspective view from the front side with the fall arrest device shown in Figure 1 attached. A perspective view from the rear side with the fall arrest device shown in Figure 1 attached. Rear view of the lanyard used in the fall arrest device shown in Figure 1 A rear view showing a second embodiment of the fall arrest device according to the present invention A perspective view from the front side with the fall arrest device shown in Figure 5 attached. A perspective view from the rear side with the fall arrest device shown in Figure 5 attached.

A first embodiment of a fall arresting device 1 according to the present invention will be described based on the drawings. As shown in FIGS. 1 to 4, this fall arresting device 1 has a shoulder strap 2, a thigh strap 3, a resting hook 4, and a lanyard 5 as main components.

The shoulder belt 2 is a member that is hung around the user's left and right shoulders and reaches the waist. The belt around the left shoulder (hereinafter referred to as left belt 6) and the belt around the right shoulder (hereinafter referred to as right belt 7) intersect at the upper part of the user's back (near the space between the left and right shoulder blades). . The front side of the right band 7 and the back side of the left band 6 are sewn and fixed to each other while intersecting at the user's right flank. Further, the front side of the left belt 6 and the rear side of the right belt 7 are sewn and fixed to each other while intersecting at the user's left flank. On the chest side of the user, the left belt 6 and the right belt 7 can be fixed by a chest fixing member 8 that is provided in the horizontal direction and can be separated and connected.

The thigh strap 3 is connected to the lower ends of the shoulder straps 2 (left strap 6, right strap 7) and is wrapped around the left and right thighs of the user, respectively. The thigh band 3 has an annular shape and is sewn and fixed to the ends of the left band 6 and right band 7, respectively.

A waist belt 9 that is hung around the user's waist is provided at a height corresponding to the user's waist. The waist belt 9 is sewn and fixed to the shoulder belt 2 (left belt 6, right belt 7) and also to the lanyard 5. The strength of the stitching to fix the lanyard 5 is lower than the strength of the stitching to the shoulder belt 2, etc. For example, if a large impact is applied to the lanyard 5 during a fall, the sewing will come off and the waist belt 9 and the lanyard 5 will be separated. configured to separate. By separating in this way, when the user is about to fall, the device assumes a hanging position similar to conventional fall arrest devices, and can prevent the user from falling while distributing the impact to the limbs and torso.

The rest hook 4 is a member for locking a lanyard hook 10, which will be described later, when not in use, and is provided on the waist belt 9. This position is near the lower end of the hem of secondary equipment such as air-conditioned clothing when the user is wearing it (see the dashed-dotted line in Figures 2 and 3). By rolling up the lanyard hook 10, the lanyard hook 10 can be easily engaged with the rest hook 4.

As shown in FIG. 4, the lanyard 5 has a mounting portion 11, a shock absorber 12, a branch portion 13, and a hook portion 14 as main components.

The attachment part 11 is a member that is attached to the shoulder belt 2 at the back part (the part where the left belt 6 and the right belt 7 intersect) of the shoulder belt 2 which is hung around the left and right shoulders of the user. In this embodiment, the shoulder strap 2 and the attachment part 11 are provided so that they cannot be removed, but the shoulder strap 2 and the attachment part 11 can also be made detachable (the lanyard 5 can be replaced).

The shock absorber 12 is a member that absorbs the impact caused by a fall by expanding in its length direction due to the impact of the fall. This shock absorber 12 extends downward from the mounting portion 11.

A stretchable rope 15 is provided at the lower end of the shock absorber 12 via a metal fitting 16. The rope 15 is folded back at the metal fitting 16 so that its entire length is divided into two equal parts. A holding member 17 for bundling the two folded ropes 15 is provided near the folded portion (below the metal fitting 16). The holding force exerted by the holding member 17 is so small that when an impact occurs due to a fall, the holding force is released and the bundled ropes 15 are expanded (separated into left and right sides). When the holding by the holding member 17 is released and the bundled ropes 15 are expanded, the impact is absorbed. As the holding member 17, various means such as a metal fitting configured to be detached from the bundled rope 15 when an impact is applied, a hook-and-loop fastener, sewing thread, an easily breakable sheet, etc. can be adopted. Note that the position of the shock absorber 12 is not limited to the position shown in FIG. 1, and may be moved somewhat in the vertical direction.

The branch portion 13 is located below the shock absorber 12 and at a height comparable to the height of the user's waist. In this embodiment, the lower end of the holding member 17 corresponds to the branch portion 13 .

The hook portion 14 has a rope 15 branched left and right from the branch portion 13 and a lanyard hook 10 provided at the tip of the rope 15. In this embodiment, a so-called "double hook" configuration is shown in which there are two ropes 15 branched to the left and right, but a "single hook" configuration in which only one rope 15 is provided is also possible. This lanyard hook 10 can be locked to a resting hook 4 provided on the waistband 9 when not in use.

The manner in which this fall arrest device 1 is used will be explained. First, the left belt 6 of the shoulder belt 2 is put around the left shoulder, and the right belt 7 is put around the right shoulder, and then the left belt 6 and the right belt 7 are fixed by the chest fixing member 8. Next, the thigh belt 3 is wrapped and fixed around the left and right thighs, and the waist belt 9 is wrapped around the waist. Then, the left and right lanyard hooks 10 of the lanyard 5 are respectively locked to the rest hooks 4. Additionally, secondary equipment such as air-conditioned clothing is worn over the fall arrest equipment.

The fall arrest device 1 (lanyard 5) according to this embodiment is configured such that when the user is wearing the secondary equipment, the branch portion 13 is at approximately the same height as the hem of the secondary equipment. Since the rope 15 branched from this branching part 13 tends to be on the underside of the hem of the secondary equipment, it is possible to prevent the hem from rolling up. Furthermore, since the resting hook 4 for locking the lanyard hook 10 is provided at the height of the user's waist, the lanyard hook 10 can be easily attached to and removed from the resting hook 4 while wearing secondary equipment. It can be carried out. Therefore, the workability and safety of the fall prevention device 1 using the lanyard 5 for the fall prevention device can be improved without impairing the performance of the secondary equipment.

Further, in the fall arresting device 1 according to this embodiment, when the user falls during use and an impact is applied to the lanyard 5, the holding member 17 breaks due to the impact, and the bundled rope 15 and shock absorber 12 As the rope 15 unfolds, the impact is absorbed by the elasticity of the rope 15. Therefore, it is possible to prevent a large impact from being applied to the user.

A second embodiment of the fall arrest device 1 according to the present invention is shown in FIGS. 5 to 7. The basic configuration of the fall prevention device 1 according to the second embodiment is the same as that of the fall prevention device 1 according to the first embodiment, but the difference is that the waist belt 9 is not provided. In the second embodiment, the rest hook 4 is provided on the thigh band 3. Similar to the first embodiment, this position is near the lower end of the hem of secondary equipment such as air-conditioned clothing when the user is wearing it (see the dashed-dotted line shown in FIGS. 6 and 7). The lanyard hook 10 is configured to be easily locked to the rest hook 4. Therefore, the workability and safety of the fall prevention device 1 using the lanyard 5 for the fall prevention device can be improved. Note that a suspension hook 4 may be provided near the lower end of the shoulder band 2 instead of the thigh band 3.

The embodiments disclosed herein are illustrative in all respects and should not be considered restrictive. Therefore, the scope of the present invention is indicated by the claims rather than the above description, and it is intended that equivalent meanings and all modifications to the claims are intended to be included.

1 Fall arrest device 2 Shoulder belt 3 Thigh strap 4 Resting hook 5 Lanyard 6 Left belt 7 Right belt 8 Chest fixing member 9 Waist belt 10 Lanyard hook 11 Attachment part 12 Shock absorber 13 Branch part 14 Hook part 15 Rope 16 Metal fitting 17 Holding member

Claims (2)

an attachment part (11) attached to the shoulder belt (2) at the back part of the shoulder belt (2) which is hung around the left and right shoulders of the user;
a shock absorber (12) extending downward from the mounting portion (11);
a branch part (13) below the shock absorber (12) and corresponding to the height of the user's waist;
a hook portion (14) comprising a rope (15) branched left and right from the branch portion (13) and a lanyard hook (10) provided at the tip of the rope (15);
Lanyard for fall arrest equipment with. a shoulder belt (2) that is hung around the left and right shoulders of the user and reaches the waist;
a thigh strap (3) connected to the lower end of the shoulder strap (2) and wrapped around the left and right thighs of the user;
a resting hook (4) provided at a position equal to or lower than the waist height of the user of the shoulder belt (2) or the thigh belt (3);
A lanyard (5) for a fall arrest device according to claim 1;
A fall prevention device, wherein a lanyard hook (10) of the lanyard (5) for the fall prevention device is configured to be latched to the rest hook (4).

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